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y in (-oo:+oo)
(3/8)*y+1/12 = (5/8)*y+5/12 // - (5/8)*y+5/12
(3/8)*y-((5/8)*y)+1/12-(5/12) = 0
(3/8)*y+(-5/8)*y+1/12-5/12 = 0
-1/4*y-1/3 = 0 // + 1/3
-1/4*y = 1/3 // : -1/4
y = 1/3/(-1/4)
y = -4/3
y = -4/3
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